class_docstr: MemorySize is a representation of a number of bytes, viewable in different units.
code: def __hash__(self):
      return self._j_memory_size.hashCode()
  
imports: from typing import Optional
  from pyflink.java_gateway import get_gateway
label_desc: Use image node_id 10 for calling the MemorySize obj's underlying member method code with example usage: obj.__hash__() and returns: self